Question: Is Mary of Teck siblings with Alexander Cambridge, the 1st Earl of Athlone, and Prince Francis of Teck?
Paraphrase: Are Alexander Cambridge, 1st Earl of Athlone, Prince Francis of Teck and Mary of Teck related?
SPARQL (Wikidata): ASK WHERE { wd:Q76927 wdt:P3373 wd:Q335091 . wd:Q76927 wdt:P3373 wd:Q5641192 }